package com.itheima.health.dao;

import com.itheima.health.pojo.NanNv;
import tk.mybatis.mapper.common.Mapper;

import java.util.List;
import java.util.Map;

public interface NanNvDao extends Mapper<NanNv> {
    /**
     * @Author: 86166
     * @Date: 10:04 2021/1/20
     * @Parms []
     * @ReturnType: java.util.List<java.util.Map<java.lang.String,java.lang.Object>>
     * @Description: 查询男女占比
    */
    List<Map<String,Object>> countByGender();
}
